<template>
  <button class="g-button" :class="{[`icon-${iconPosition}`]: true}"
    @click="$emit('click')">
    <g-icon class="icon" v-if="icon && !loading" :name="icon"></g-icon>
    <g-icon class="loading icon" v-if="loading" name="loading"></g-icon>
    <div class="content">
      <slot></slot>
    </div>
  </button>
</template>

<script lang="ts">
import Icon from '../icon.vue'
export default {
  name: 'FreeButton',
  components:{
    'g-icon': Icon
  },
  // props: ['icon', 'iconPosition']
  props: {
    icon: {},
    loading: {
      type: Boolean,
      default: false
    },
    iconPosition: {
      type: String,
      default: 'left',
      validator(value){
        return value === 'left' || value === 'right'
      }
    }
  }
};
</script>

<style lang="scss" scoped>
@keyframes spin {
  0%{ transform: rotate(0deg)}
  100%{ transform: rotate(360deg)}
}
.g-button {
  $font-size: 14px;
  $button-height: 32px;
  $button-bg: white;
  $button-active-bg: #eee;
  $border-radius: 4px;
  $color: #333;
  $border-color: #999;
  $border-color-hover: #666;
  font-size: $font-size;
  height: $button-height;
  padding: 0 1em;
  border-radius: $border-radius;
  border: 1px solid $border-color;
  background: $button-bg;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  vertical-align: middle;

  &:hover {
    border-color: $border-color;
  }

  &:active {
    background-color: $button-active-bg;
  }

  &:focus {
    outline: none;
  }

  > .icon {
    order: 1;
    margin-right: .1em;
  }

  > .content {
    order: 2;
  }

  &.icon-right {
    > .content {
      order: 1;
    }

    > .icon {
      order: 2;
      margin-right: 0;
      margin-left: .1em;
    }
  }
  .loading{
    animation: spin 1s infinite linear;
  }
}

</style>